气候变化领域集成服务门户(CCPortal): Herbicide, fertilization, and planting density effects on intensively managed loblolly pine early stand development

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DOI	10.1016/j.foreco.2020.118206
	Herbicide, fertilization, and planting density effects on intensively managed loblolly pine early stand development
	Ferreira G.W.D.; Rau B.M.; Aubrey D.P.
发表日期	2020
ISSN	0378-1127
卷号	472
英文摘要	Production forestry in the southeast US has been partially transitioned to intensively managed short rotations (~10 years), in which multiple silvicultural interventions are performed during forest development. Understanding the responses to silvicultural practices and continued refinement of site-specific recommendations is critical to sustainably maximize forest production. We evaluated the effects of silvicultural practices (herbicide, fertilization, and planting density) on growth, stand homogeneity, and above- and belowground biomass accumulation and partitioning of loblolly pine (Pinus taeda) throughout early stand development (age 5 years) in the southeastern US. Five treatments with eight replications each were tested: no herbicide and no fertilization (C); herbicide only (H); herbicide and half-reduced fertilization rate (R); herbicide and full fertilization (F); and increased stand density (60+ %; 1346 vs. 2152 trees per hectare) with herbicide and full fertilization rate (D). Allometric equations generated from destructive harvests were applied to annual diameter measurements to estimate plot-level biomass and allocation. Herbicide was crucial to promote stand uniformity and increase yield (~600+ % stem biomass compared with C at age 5). Aboveground biomass was similar in R and F treatments, which was ~25% higher than in H at age 5. Increasing planting density along with multiple herbicide and fertilizer applications yielded higher biomass without compromising individual tree size (diameter and height). There was little effect of silviculture practices on allocation patterns. Our results parallel what was found for fertilization with herbicide from a number of loblolly stands under similar conditions and indicate a ~28% volume gain with fertilization during early stand development. Similarly, our results were consistent with other studies implementing similar differences in planting density and suggest a ~26% volume gain through early stand development with an initial 60% increase in planting density. Our study helps to understand complex relationships between production and silvicultural practices during early stand development and demonstrates that silvicultural prescriptions can be optimized to increase sustainability of production forestry. © 2020 Elsevier B.V.
关键词	Biomass Herbicides Timber Weed control Above ground biomass Allometric equations Complex relationships Early stand development Fertilizer applications Silvicultural practices Silvicultural prescriptions Silviculture practices Forestry biomass coniferous tree forest management forestry practice plantation forestry silviculture stand structure sustainability sustainable forestry Biomass Development Fertilization Forestry Herbicides Planting Stand Density Weed Control United States Pinus taeda
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132759
推荐引用方式 GB/T 7714	Ferreira G.W.D.,Rau B.M.,Aubrey D.P.. Herbicide, fertilization, and planting density effects on intensively managed loblolly pine early stand development[J]. Forest Ecology and Management,2020,472.
APA	Ferreira G.W.D.,Rau B.M.,&Aubrey D.P..(2020).Herbicide, fertilization, and planting density effects on intensively managed loblolly pine early stand development.,472.
MLA	Ferreira G.W.D.,et al."Herbicide, fertilization, and planting density effects on intensively managed loblolly pine early stand development".472(2020).